Tumors of Ear MCQs

GLOMUS JUGULARE It is benign non capsulated locally invasive highly vascular tumour. It is more common in females. Site of origin- it arises from glomus cells lying around the jugular bulb. It is skull based jugular foramen tumour. The red vascular tumor erodes the floor of the middle ear and grows into hypotympanum This is called the Rising Sun sign. Reference : Diseases of Ear, Nose and Throat & Head and Neck Surgery by P L Dhingra, 8th Edition, Chapter name: Tumours of Middle Ear and Mastoid, Page number: 128, 129

Since the tumour size is small and age of the patient is 73, it will be appropriate to go for Gamma Knife therapy, a stereotactic radiotherapy. Indications for Gamma Knife Therapy: Patient unwilling for surgery Patient unfit for surgery Old patient with small tumor with residual hearing. Middle cranial fossa approach is preferred for small tumors with residual hearing. It will lead to hearing preservation. If this patient would have been young, we would have gone for choice D. Translabyrithine approach is good for large size tumours with no residual hearing. Hearing preservation is not possible in this. Reference: Diseases of Ear, Nose and Throat & Head and Neck Surgery by P L Dhingra, 8 th Edition, Page - 134. Scott Brown's Otolaryngology, Head and Neck Surgery, 8 th edition, Volume 2, Page - 1263.

Glomus jugulare is a benign non capsulated locally invasive highly vascular tumour. It erodes the floor of middle ear and start growing in Hypotympanum as red vascular mass(Rising sun sign). Reference : Diseases of Ear, Nose and Throat & Head and Neck Surgery by P L Dhingra, 8th Edition, Chapter name: Tumours of Middle Ear and Mastoid, Page number: 128, 129

Glomus jugulare invades the hypotympanum. Reference: Diseases of Ear, Nose and Throat & Head and Neck Surgery by P L Dhingra, 8 th Edition, Page - 128.

Acoustic neuroma Treatment is surgical excision. Indications for Gamma Knife Therapy Patient unwilling for surgery Patient unfit for surgery Old patient with small tumor with residual hearing. Reference : Diseases of Ear, Nose and Throat & Head and Neck Surgery by P L Dhingra, 8th Edition, Chapter name: Accoustic Neuroma, Page number: 132

Acoustic neuromas are intracranial, extra-axial tumors that arise from the Schwann cells, investing either the vestibular or cochlear nerve. This can often be demonstrated through audiological testing by a phenomenon called "rollover," in which speech discrimination scores decrease as the volume of the speech stimulus increases. A normal score is 80% or greater. Reference: Diseases of Ear, Nose, AND Throat by PL Dhingra, Pg no. 426

Acoustic neuroma (Vestibular Schwannoma) It's a benign slow growing tumor of the 8th nerve. Most common site of origin is Inferior Vestibular division of 8 th nerve. It is common in the 4th-5th decade. It is mostly unilateral except in Neurofibroma-2 (bilateral vestibular schwannoma) It's a brain tumor. It is the most common type of Cerebellopontine angle tumour. Ear examination NORMAL. Reference : Diseases of Ear, Nose and Throat & Head and Neck Surgery by P L Dhingra, 8th Edition, Chapter name: Accoustic Neuroma, Page number: 132

Acoustic neuroma (Vestibular Schwannoma) It's a benign slow growing tumor of the 8th nerve. Most common site of origin is Inferior Vestibular division of 8 th nerve. It is common in the 4th-5th decade. It is mostly unilateral except in Neurofibroma-2 (bilateral vestibular schwannoma) Reference : Diseases of Ear, Nose and Throat & Head and Neck Surgery by P L Dhingra, 8th Edition, Chapter name: Accoustic Neuroma, Page number: 132</p